Turbines

Kaplan turbines allow numerous applications, even in very different sectors. They are used in the presence of generally small heads and up to 50 meters. They take advantage of the large flow of the river, which can reach up to a hundred cubic meters per second. They can be built with the vertical, horizontal or inclined axis, as well as in a dry or wet room. The construction, based on the head and the capacity, can have a fixed distributor and adjustable blades, in this case, the turbine is of simple adjustment, also called mono-regulating. When both the distributor and the blades are variable in running, then the turbine becomes bi-regulating. With the double regulation, it is possible to obtain greater advantages, on the capacities modulation and on the heads. In this case, the performance curve remains constant practically over almost the entire range of capacities, so as to obtain a better degree of efficiency.

Cross Flow-Banki turbines are suitable for working with heads between 4 and 60 meters and are also characterized by their versatility mainly due to the special crossflow. The water enters from the upper side, crosses the impeller axis, and comes out again from the lower side, increasing the efficiency of the turbine. The peculiar characteristics of these turbines are the simple construction and robustness, which allow a modular and low-cost construction. The water passes through the distributor and the entrance chamber, specifically divided into a third or two-thirds, favors operation with both small and medium capacities. Under maximum capacity conditions, the turbine works with the two chambers in parallel. The generosity and flexibility of this turbine are also determined by the uniform performance over the entire flow range.

Bulb turbines are made from Kaplan turbines and are much simpler. They are usually used for heads of a few meters. The peculiarity of these machines lies in the bulb, immersed in water, where the alternator for energy production is located.

Hydraulic screws are also known as Archimedes' wheel. They invert the operating principle and take advantage from the potential difference of the falling water, from the highest point until it flows again in the course of natural water.

They are used for heads up to 10 meters and capacities up to 6 mc/s.

Mini turbines are the ideal solution to have electricity especially in those areas not subject to the distribution network. They derive from series production, but constructively are much simpler. The regulation is done with variable speed drives. These also reduce the consumption of traditional fuels avoiding air pollution.

The turbines produced by Misa are special customized machines, suitable for the most varied applications and with excellent performance in wide ranges of capacities and heads.

3D solid modeling, FEM structural analysis, a selected rotation speed together with the fluid dynamic study C.F.D. are the determining factors capable of guaranteeing a high quality standard, required for H24 services. Checks and tests during the construction phases, even in the presence of the customer, optimize the installation phase, guaranteeing immediate energy production.